• Journal of Ginseng Research
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• 제23권2호
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• pp.88-92
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• 1999

추출 시간을 5시간으로 단축하고, 추출 온도를 $33\~50^{\circ]C$로 설정한 진공력적방식 조건과 $80^{\circ]C$의 고온의 다중단 추출방식 간의 조사포닌 함량비교 결과, 고온의 다중단 추출방법으로 제조한 엑스의 조사포닌 함량이 $8\~9\%$인데 비하여 저온 및 단시간 추출인 진공력적 추출방법은 조사포닌 함량이 $11.5\%$로 $41.9\%$ 높았다. 또한 진공력적 추출방법이 엑스 수득율비교에서도 $13.6\%$ 증가하였다. 향미는 종합적으로 진공력적엑스가 강하였으며 이를 선호하는 경향이었다. 진공력적추출 엑스의 색상은 기존 제품 엑스와 유사하였고 유동성이 좋았다. 진공력적 추출법은 짧은 추출 시간과 공정 자동화로 인건비 감소를 기대할 수 있으며, HPLC 패턴으로 사포닌 분해가 거의 없음을 확인 할 수 있었다.

• 한국식품저장유통학회지
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• 제6권3호
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• pp.324-327
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• 1999

추출 시간을 5시간으로, 추출 온도를 33-5$0^{\circ}C$로 설정한 진공역적방식 조건과 8$0^{\circ}C$의 고온의 다중단 추출방식 간의 조사포닌 함량비교 결과, 고온의 다중단 추출방법으로 제조한 흥삼엑스의 조사포닌 함량이 8.1-8.2%인데 비하여, 저온 및 단시간 추출인 진공역적 추출방법은 조사포닌 함량이 5.4-5.9%로 조사포닌 함량은 낮은 반면에 사포닌 Rg$_1$ 및 Re의 분해가 거의 없는 것으로 나타났다. 또한 진공역적 추출방법이 다중단 추출방식보다 수율에서도 15-20% 높은 경향을 나타내었다. 진공역적추출 엑스의 색상은 기존 다중단 추출 방식으로 추출된 엑스와 유사하였고, 유동성은 보다 향상된 것으로 나타났다.

• 에너지공학
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• 제2권1호
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• pp.68-74
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• 1993

본 연구에서는 감압잔사유의 활용을 극대화하는 것을 목적으로 초임계 용매 추출법을 이용하여 탈아스팔트오일을 추출하였다. 초임계 용매로 n-pentane을 사용하였으며 온도와 압력 변화에 따른 추출수율과 추출된 오일 중 금속성분 및 황성분 함량의 변화가 조사되었다. 탈아스팔트오일의 추출수율은 사용한 용매의 초임계 영역에서 밀도에 크게 좌우됨이 조사되었고 추출유의 금속성분 함량은 감압잔사유에 비하여 크게 제거되었으나, 황성분 제거율은 낮았다.

• Archives of Metallurgy and Materials
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• 제66권4호
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• pp.1001-1005
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• 2021

Liquid Metal Extraction process using molten Mg was carried out to obtain Nd-Mg alloys from Nd based permanent magnets at 900℃ for 24 h. with a magnet to magnesium mass ratio of 1:10. Nd was successfully extracted from magnet into Mg resulting in ~4 wt.% Nd-Mg alloy. Nd was recovered from the obtained Nd-Mg alloys based on the difference in their vapor pressures using vacuum distillation. Vacuum distillation experiments were carried out at 800℃ under vacuum of 2.67 Pa at various times for the recovery of high purity Nd. Nd having a purity of more than 99% was recovered at distillation time of 120 min and above. The phase transformations of the Nd-Mg alloy during the process, from Mg₁₂Nd to α-Nd, were confirmed as per the phase diagram at different distillation times. Pure Nd was recovered as a result of two step recycling process; Liquid Metal Extraction followed by Vacuum Distillation.

• 연구논문집
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• 통권30호
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• pp.147-157
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• 2000

The filtered vacuum arc source (FVAS), which is adopted by magnetic filtering methode to remove the macro-particle in vacuum arc plasma, was composed of a torus structure with bending angle of 60 degree. The radius of torus was 266 mm, the radius of plasma duct was 80 mm and the total length was 600 mm. The magnet parts were consisted of one permanent magnet, one magnetic yoke and five solenoid magnets. The plasma duct was electrically isolated from the ground so that a bias voltage could be applied. The baffles inside plasma duct were installed in order to prevent the recoil effect of macro-particles. Graphite was used as the cathode material to coat the amorphic diamond film and its diameter was 80 mm. The amorphic diamond film attracts much attention due to its excellent mechanical, optical and tribological properties suitable for wide range of applications. The effects of solenoid magnet in plasma extraction were studied by computer simulation and experiment using Taguchi's method. The source and extraction magnet affected the arc stabilization. The extraction beam current was maximized with low value of the source magnet current and high value of the filtering magnet current. Optimum deposition condition was obtained when the currents of arc discharge, source, extraction, bending, deflection and outlet magnet were 30 A, 1 A, 3 A, 5 A, and 5 A, respectively.

• 한국조리학회지
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• 제23권3호
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• pp.166-173
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• 2017

This study was performed to compare the vitamin A, E, ${\beta}-carotene$, polyphenol content, and DPPH radical scavenging activity of carrot, apple, and blueberry juices as affected by extraction methods using slow juicer (HJ), no vacuum blending (NVJ) and vacuum blending (VJ). Juice yields of carrot, apple, and blueberry were 100% in NVJ and VJ groups. Vitamin A content of all juices was the highest in VJ group. Vitamin E content in carrot and apple juices increased most in the HJ group, followed by the NVJ and VJ group; Vitamin E content in blueberry juice was higher in the NVJ group than VJ or HJ group. ${\beta}-carotene$ and polyphenol content in all juices were highest in the VJ group. In addition, the differences between vacuum blending and non-vacuum blending were only shown on apple and blueberry juices. Polyphenol content in carrot and blueberry juices increased most in the HJ group, followed by the NVJ, and VJ groups, and in apple juice, polyphenol content was higher in the VJ group than the HJ or NVJ group. DPPH radical scavenging activity in the VJ group was significantly higher than the NVJ group. The results of this study showed the vacuum blending method had outstanding antioxidative nutrients compared to other juicing methods.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1999년도 제16회 학술발표회 논문개요집
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• pp.67-67
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• 1999

• 한국진공학회:학술대회논문집
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• 한국진공학회 2008년도 제35회 하계학술대회 초록집
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• pp.194-194
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• 2008

• 한국진공학회:학술대회논문집
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• 한국진공학회 1996년도 제10회 학술발표회 논문개요집
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• pp.177-177
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• 1996

• 한국약용작물학회지
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• 제22권4호
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• pp.255-261
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• 2014

Cosmetic activities of the leaves of Curcuma longa L. were compared according to different drying methods, to expand the use of the by-products of Curcuma longa L. The highest extraction yield of 29.4% was obtained from vacuum drying process (VD), whose value was very close to 29.2% from freeze drying process (FD). Relatively lower extraction yield were observed as 24.5% and 25.3% from the raw leaf (RL) as control and hot air drying process (HD). The cytotoxicity was observed lower FD and VD than RL and HD. It shows that cytotoxicity was closely related to cosmetic activities such as tyrosinase and melanin inhibition activities by showing much better cosmetic activities of the extracts from both FD and VD than those from the RL and HD. It was interesting that was differences of the cosmetic activities and cytotoxicity between FD and VD, which implies that VD method should be a more efficient process than FD method in terms of drying time and operation costs: 6 hours vs 24 hours and 3-5 times higher extraction costs in drying. It was observed that VD is more excellent dry method than others. This result could be utilized to effectively dry other soft plant biomass.